Project description:We have developed and optimized a reliable medium-throughput culture system for pig and human heart slices as a platform for testing the efficacy of novel heart failure therapeutics and reliable testing of cardiotoxicity in a 3D heart model.
Project description:Adult cardiac tissue undergoes a rapid process of dedifferentiation when cultured in vitro. The aim of this experiment was to compare the transcriptome of freshly prepared rat myocardial slices with slices cultured in unloaded conditions (no electromechanical stimulation) for 24 hours, electromechanical stimulation @ SL=1.8 for 24 hours & electromechanical stimulation @ SL=2.2 for 24 hours.
Project description:Conventional in vitro cell cultures are relatively available and have been widely used in explaining many mechanisms, but their simple construction is not directly applied to the in vivo environment. A possible solution to overcome this problem is special in vitro model maintained with cardiac slices. Slices show a preserved architecture, multi-cellularity and physiology of the heart tissue. This approach creates a bridge between the gap in cellular and in vivo studies. This study demonstrated that it is possible to find protein biomarkers between rat myocardial slices which were stretched to sarcomere lengths (SL) within the physiological range of 1.8–2.4μm and slices cultured without electromechanical stimulation and with fresh myocardial slices.
Project description:Rat small intestine precision cut slices were exposed for 6 hours to in vitro digested yellow (YOd) and white onion extracts (WOd) that was followed by transcriptomics analysis. The digestion was performed to mimic the digestion that in vivo takes place in the stomach and small intestine. The transcriptomics response of the rat small intestine precision cut slices was compared to that of human Caco-2 cells and the pig in-situ small intestinal segment perfusion. The microarray data for the human Caco-2 cells (GSE83893) and the pig in-situ small intestinal segment perfusion (GSE83908) have been submitted separately from the current data on rat intestine. The goal was to obtain more insight into to which extent mode of actions depend on the experimental model. A main outcome was that each of the three models pointed to the same mode of action: induction of oxidative stress and particularly the Keap1-Nrf2 pathway.
Project description:Proteomic analysis was performed on secreted proteins from non human primate (NHP) heart slices (from Macaca fascicularis) in presence or absence of Cardiac progenitors (CPs) 48 h after radiofrequency ablation (RFA) to mimic tissue damage.
Project description:An affinity guided approach coupled with multiplexed quantitative proteomics, namely Biomimetic Virulomics, for successful identification of cell-type specific effector proteins of both prokaryotic and eukaryotic pathogens.